Contribution of the 5-HT(1B) receptor to hypoxia-induced pulmonary hypertension: converging evidence using 5-HT(1B)-receptor knockout mice and the 5-HT(1B/1D)-receptor antagonist GR127935 - Keegan,A.; Morecroft,I.; Smillie,D.; Hicks,M.N.; MacLean,M.R. (Circ Res, 2001)